EP0583652B1 - Injection molding nozzle insert - Google Patents

Injection molding nozzle insert Download PDF

Info

Publication number
EP0583652B1
EP0583652B1 EP93111931A EP93111931A EP0583652B1 EP 0583652 B1 EP0583652 B1 EP 0583652B1 EP 93111931 A EP93111931 A EP 93111931A EP 93111931 A EP93111931 A EP 93111931A EP 0583652 B1 EP0583652 B1 EP 0583652B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
mold
insert
seating
injection molding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93111931A
Other languages
German (de)
French (fr)
Other versions
EP0583652A1 (en
Inventor
Jobst Ulrich Gellert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0583652A1 publication Critical patent/EP0583652A1/en
Application granted granted Critical
Publication of EP0583652B1 publication Critical patent/EP0583652B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C2045/2761—Seals between nozzle and mould or gate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C2045/277—Spacer means or pressure pads between manifold and mould plates

Definitions

  • the present invention relates to an injection molding seating insert according to the preamble of claim 1.
  • US-A-5,049,062 shows the nozzle seat being provided by a gate insert, while the sealing is provided by a sealing and locating flange extending around the nozzle.
  • US-A-5,118,279 does show a sleeve which provides both locating and sealing, but the sleeve is applicable only to a probe having spaced fins which project outwardly into contact with the sleeve.
  • an object of the present invention to at least partially overcome the disadvantages of the prior art by providing an insert for mounting an injection molding nozzle in a mold which both seats the nozzle in the mold and seals against the escape of pressurized melt into the insulative air space.
  • the claimed insert is integrally formed of both a V-shaped sealing portion and a seating portion, considerable ease of manufacturing and reduction of manufacturing costs are achieved. Furthermore, due to the inwardly and outwardly sideward protruding portion of the V-shaped sealing, undesired steel to steel contact portions of the heated nozzle and the insert are minimized, so that a first insulative air space is formed between the nozzle and the insert and a second insulative air space is formed between a central portion of the insert and the mold.
  • Figure 1 shows a portion of an edge gated injection molding system showing a seating and sealing insert 10 according to the invention for mounting a heated nozzle 12 in a well 14 in a mold 16.
  • the system shown has a heated steel manifold 18 to distribute melt to several spaced nozzles 12, and each nozzle 12 then distributes the melt to several spaced edge gates 20 leading to different cavities 22.
  • the seating and sealing insert according to the invention can be used with a wide variety of gating configurations other than the one shown. While, in this case, each well 14 extends through a manifold retainer plate 24 into a cavity plate 26, other arrangements of mold plates can be used for other configurations.
  • each nozzle 12 has a forward member 28 with a tapered rear portion 30 which is frictionally received in a matching tapered well 32 in a rear member 34.
  • the nozzle 12 is heated by a helical electrical heating element 36 which is integrally brazed in the rear member 34 and extends to an external terminal 38.
  • the nozzle 12 has an outer surface 40, a support flange 42, a forward end 44, and a rear end 46.
  • a locating pin 48 extends from the nozzle 12 and is secured by a cam 50 to ensure accurate alignment of the nozzle 12.
  • a titanium support spacer 52 is seated between the forward end 44 of the nozzle 12 and the cavity plate 26 to ensure the forward member 28 is retained in place.
  • the melt distribution manifold 18 has a cylindrical inlet portion 54 and an electrical heating element 56.
  • a melt passage 58 extends from a common inlet 60 in the inlet portion 54 and branches outward to extend through each nozzle 12 where it branches again to each gate 20.
  • the manifold 18 is mounted between the manifold retainer plate 24 and a steel back plate 62.
  • Insulative and resilient spacer members 64 are located between the manifold 18 and the back plate 62 by pins 66.
  • Bolts 68 which extend through the mold plates to hold them together apply a force through the spacer members 64 to hold the manifold 18 and nozzles 12 securely in this position.
  • Bolts 70 which extend from the manifold 18 into the mold also secure the manifold 18 tightly against the rear ends 46 of the nozzle 12.
  • a central locating ring 72 is seated between the manifold 18 and the manifold retainer plate 24 to accurately locate the manifold in place. This provides an insulative air space 74 between the heated manifold 18 and the adjacent manifold retainer plate 24, spacer plate 76, and back plate 62 which are cooled by pumping water through cooling conduits 78.
  • each nozzle 12 and the surrounding inner surface 80 of the well 14 are shaped to receive the seating and sealing insert 10 according to the invention and form another insulative air space 82 between them to provide further thermal separation by minimizing steel to steel contact between the heated and cooled components of the system.
  • the insert 10 which is made of steel, is hollow and has a central opening 84 to receive the nozzle 12 therethrough.
  • the insert 10 has a hollow cylindrical central portion 86 extending between a hollow rear seating portion 88 and a hollow forward sealing portion 90.
  • the central portion 86 has a cylindrical wall 92 with an inner surface 94 and an outer surface 96.
  • the rear seating portion 88 of the insert is outwardly flanged from the central portion 86 to form a circular forward facing outer shoulder 98 and a circular rearward facing inner shoulder 100.
  • the outer shoulder 98 seats against a matching rearwardly facing circular shoulder 102 in the well 14 of the mold 16.
  • the rear seating portion 88 extends rearwardly around the rearward facing inner shoulder 100 to form a cylindrical seat 104 in which the cylindrical support flange 42 of the nozzle 12 is received.
  • the real seating portion 88 of the insert 10 accurately supports the nozzle 12 in the well 14 in the mold 16 with a portion of the nozzle 12 extending through the central opening 84 in the insert 10.
  • the sealing portion 90 of the insert 10 extends forwardly from the cylindrical central portion 86 and has a uniform cross section with a V - shaped forward face 106 extending between an inner surface 108 and an outer surface 110.
  • the forward sealing portion 90 is wider than the central portion 86 so the insulative air space 82 extends on both sides of the central portion 86.
  • the forward portion 90 extends inwardly from the inner surface 94 of the cylindrical wall 92 of the central portion 86 to the inner surface 108 which seals against the outer surface 40 of the nozzle 12.
  • the forward portion 90 extends outwardly from the outer surface 96 of the cylindrical wall 92 of the central portion 86 to the outer surface 110 which seals against the inner surface 80 of the well 14 in the surrounding mold 16.
  • the forward portion 90 of the insert 10 bridges the insulative air space 82 to prevent pressurized melt from escaping from the area 112 around the forward member 28 of the nozzle 12 into the insulative air space 82 around the rear member 34 of the nozzle 12.
  • the inner and outer sealing surfaces 108, 110 of the forward portion 90 have small circumferential insulative grooves 114 to further reduce steel to steel contact.
  • the well 14 in the mold 16 has a substantially uniform diameter from the gates 20 rearwardly to the rearward facing circular shoulder 102 and the outer diameter of the forward member 28 of the nozzle 12 is considerably greater than the inner diameter of the insert 10.
  • the seating and sealing insert 10 must be positioned between the forward and rear members 28, 34 of the nozzle 12 before they are fitted together and mounted in the well 14 in the mold 16.
  • the insert 10, nozzle 12 and mold 16 can have other configurations and dimensions where this is not required.
  • the injection molding system is assembled as shown in Figure 1. Electrical power is applied to the heating element 56 in the manifold 18 and to the heating elements 36 in the nozzles 12 to heat them to a predetermined operating temperature. Pressurized melt from a molding machine (not shown) is then injected into the melt passage 58 through the common inlet 60 according to a predetermined cycle in a conventional manner. In this embodiment, the pressurized melt branches first in the manifold 18 and then in each nozzle 12 to the edge gates 20 to fill the cavities 22. The pressure of the melt against the V -shaped face 106 of the forward sealing portion 90 of the insert 10 forces the inner and outer surfaces 108, 110 into sealing contact against the nozzle 12 and the mold 16.
  • injection pressure is held momentarily to pack and then released. After a short cooling period, the mold is opened to eject the molded products. After ejection, the mold is closed and injection pressure is reapplied to refill the cavities 22. This cycle is continuously repeated with a frequency dependent on the size and shape of the cavities and the type of material being molded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

A seating and sealing insert (10) for mounting a heated injection molding nozzle (12) in a well (14) in a mold (16). The hollow insert (10) has a cylindrical central portion (86) extending between a rear seating portion (88) and a forward sealing portion (90). The rear seating portion (88) is outwardly flanged to seat in the well (14) in the mold and forms an inner seat (104) to receive a cylindrical support flange (42) of the nozzle to accurately support the nozzle in the well (14) in the mold. The forward sealing portion (90) has a V - shaped forward face (106) and inner and outer surfaces (108,110) which are forced outwardly by melt pressure to seal against the nozzle (12) and the mold (16). Thus, the seating and sealing insert (10) provides an insulative air space (82) between the heated nozzle and the surrounding mold and the forward sealing portion (90) prevents the escape of pressurized melt into the insulative air space (82). <IMAGE>

Description

The present invention relates to an injection molding seating insert according to the preamble of claim 1.
Such an injection molding seating insert is disclosed in US-A-4,663,811.
It is well known in injection molding for a nozzle to be received in a well in a mold with an insulative air space provided between them to minimize surface to surface contact between the heated nozzle and cooled mold to reduce heat loss. It is also well known to provide a seat to accurately locate the nozzle in the well and to provide a seal to prevent pressurized melt escaping into the air space. However, in the past, separate structures have been required to provide both the seating function and the sealing function for a nozzle in a mold. The above-mentioned conventional separate structures are disclosed in the aforementioned US-A-4,663,811 which shows the nozzle having a support flange seated against a shoulder in the mold, while sealing is provided by a separate cylindrical seal having a V-shaped forward surface. Similarly, US-A-5,049,062 shows the nozzle seat being provided by a gate insert, while the sealing is provided by a sealing and locating flange extending around the nozzle. Furthermore, US-A-5,118,279 does show a sleeve which provides both locating and sealing, but the sleeve is applicable only to a probe having spaced fins which project outwardly into contact with the sleeve.
Accordingly, it is an object of the present invention to at least partially overcome the disadvantages of the prior art by providing an insert for mounting an injection molding nozzle in a mold which both seats the nozzle in the mold and seals against the escape of pressurized melt into the insulative air space.
The above object is achieved by the subject matter of claim 1.
As the claimed insert is integrally formed of both a V-shaped sealing portion and a seating portion, considerable ease of manufacturing and reduction of manufacturing costs are achieved. Furthermore, due to the inwardly and outwardly sideward protruding portion of the V-shaped sealing, undesired steel to steel contact portions of the heated nozzle and the insert are minimized, so that a first insulative air space is formed between the nozzle and the insert and a second insulative air space is formed between a central portion of the insert and the mold.
Further advantages of the invention will appear from the following description of a preferred embodiment taken together with the accompanying drawings, of which
  • Figure 1 is a partial sectional view of a portion of a multi-cavity injection molding system having a seating and sealing insert according to a preferred embodiment of the invention,
  • Figure 2 is an isometric view of the seating and sealing insert seen in Figure 1, and
  • Figure 3 is a sectional view showing the seating and sealing insert in position for assembly between the rear and forward members of the nozzle.
    • DETAILED DESCRIPTION OF THE INVENTION
    Reference is first made to Figure 1 which shows a portion of an edge gated injection molding system showing a seating and sealing insert 10 according to the invention for mounting a heated nozzle 12 in a well 14 in a mold 16. The system shown has a heated steel manifold 18 to distribute melt to several spaced nozzles 12, and each nozzle 12 then distributes the melt to several spaced edge gates 20 leading to different cavities 22. Of course, the seating and sealing insert according to the invention can be used with a wide variety of gating configurations other than the one shown. While, in this case, each well 14 extends through a manifold retainer plate 24 into a cavity plate 26, other arrangements of mold plates can be used for other configurations.
    In this arrangement, each nozzle 12 has a forward member 28 with a tapered rear portion 30 which is frictionally received in a matching tapered well 32 in a rear member 34. The nozzle 12 is heated by a helical electrical heating element 36 which is integrally brazed in the rear member 34 and extends to an external terminal 38. The nozzle 12 has an outer surface 40, a support flange 42, a forward end 44, and a rear end 46. A locating pin 48 extends from the nozzle 12 and is secured by a cam 50 to ensure accurate alignment of the nozzle 12. A titanium support spacer 52 is seated between the forward end 44 of the nozzle 12 and the cavity plate 26 to ensure the forward member 28 is retained in place.
    The melt distribution manifold 18 has a cylindrical inlet portion 54 and an electrical heating element 56. A melt passage 58 extends from a common inlet 60 in the inlet portion 54 and branches outward to extend through each nozzle 12 where it branches again to each gate 20. The manifold 18 is mounted between the manifold retainer plate 24 and a steel back plate 62. Insulative and resilient spacer members 64 are located between the manifold 18 and the back plate 62 by pins 66. Bolts 68 which extend through the mold plates to hold them together apply a force through the spacer members 64 to hold the manifold 18 and nozzles 12 securely in this position. Bolts 70 which extend from the manifold 18 into the mold also secure the manifold 18 tightly against the rear ends 46 of the nozzle 12. A central locating ring 72 is seated between the manifold 18 and the manifold retainer plate 24 to accurately locate the manifold in place. This provides an insulative air space 74 between the heated manifold 18 and the adjacent manifold retainer plate 24, spacer plate 76, and back plate 62 which are cooled by pumping water through cooling conduits 78.
    The outer surface 40 of each nozzle 12 and the surrounding inner surface 80 of the well 14 are shaped to receive the seating and sealing insert 10 according to the invention and form another insulative air space 82 between them to provide further thermal separation by minimizing steel to steel contact between the heated and cooled components of the system. As also seen in Figure 2, the insert 10, which is made of steel, is hollow and has a central opening 84 to receive the nozzle 12 therethrough. The insert 10 has a hollow cylindrical central portion 86 extending between a hollow rear seating portion 88 and a hollow forward sealing portion 90. The central portion 86 has a cylindrical wall 92 with an inner surface 94 and an outer surface 96. The rear seating portion 88 of the insert is outwardly flanged from the central portion 86 to form a circular forward facing outer shoulder 98 and a circular rearward facing inner shoulder 100. The outer shoulder 98 seats against a matching rearwardly facing circular shoulder 102 in the well 14 of the mold 16. The rear seating portion 88 extends rearwardly around the rearward facing inner shoulder 100 to form a cylindrical seat 104 in which the cylindrical support flange 42 of the nozzle 12 is received. Thus, as clearly seen in figure 1, the real seating portion 88 of the insert 10 accurately supports the nozzle 12 in the well 14 in the mold 16 with a portion of the nozzle 12 extending through the central opening 84 in the insert 10. The sealing portion 90 of the insert 10 extends forwardly from the cylindrical central portion 86 and has a uniform cross section with a V - shaped forward face 106 extending between an inner surface 108 and an outer surface 110. The forward sealing portion 90 is wider than the central portion 86 so the insulative air space 82 extends on both sides of the central portion 86. Thus the forward portion 90 extends inwardly from the inner surface 94 of the cylindrical wall 92 of the central portion 86 to the inner surface 108 which seals against the outer surface 40 of the nozzle 12. Similarly, the forward portion 90 extends outwardly from the outer surface 96 of the cylindrical wall 92 of the central portion 86 to the outer surface 110 which seals against the inner surface 80 of the well 14 in the surrounding mold 16. Thus the forward portion 90 of the insert 10 bridges the insulative air space 82 to prevent pressurized melt from escaping from the area 112 around the forward member 28 of the nozzle 12 into the insulative air space 82 around the rear member 34 of the nozzle 12. As best seen in figure 3, in this embodiment, the inner and outer sealing surfaces 108, 110 of the forward portion 90 have small circumferential insulative grooves 114 to further reduce steel to steel contact.
    In this embodiment, the well 14 in the mold 16 has a substantially uniform diameter from the gates 20 rearwardly to the rearward facing circular shoulder 102 and the outer diameter of the forward member 28 of the nozzle 12 is considerably greater than the inner diameter of the insert 10. Thus, as seen in Figure 3, the seating and sealing insert 10 must be positioned between the forward and rear members 28, 34 of the nozzle 12 before they are fitted together and mounted in the well 14 in the mold 16. Of course, in other embodiments, the insert 10, nozzle 12 and mold 16 can have other configurations and dimensions where this is not required.
    In use, the injection molding system is assembled as shown in Figure 1. Electrical power is applied to the heating element 56 in the manifold 18 and to the heating elements 36 in the nozzles 12 to heat them to a predetermined operating temperature. Pressurized melt from a molding machine (not shown) is then injected into the melt passage 58 through the common inlet 60 according to a predetermined cycle in a conventional manner. In this embodiment, the pressurized melt branches first in the manifold 18 and then in each nozzle 12 to the edge gates 20 to fill the cavities 22. The pressure of the melt against the V -shaped face 106 of the forward sealing portion 90 of the insert 10 forces the inner and outer surfaces 108, 110 into sealing contact against the nozzle 12 and the mold 16. After the cavities 22 are filled, injection pressure is held momentarily to pack and then released. After a short cooling period, the mold is opened to eject the molded products. After ejection, the mold is closed and injection pressure is reapplied to refill the cavities 22. This cycle is continuously repeated with a frequency dependent on the size and shape of the cavities and the type of material being molded.
    While the description of the inserts 10 has been given with respect to a preferred embodiment, it will be evident that various modifications are possible without departing from the scope of the invention as understood by those skilled in the art and as defined in the following claims.

    Claims (5)

    1. An injection molding seating insert (10) with an opening (84) extending centrally therethrough for mounting a heated nozzle (12) having a support flange (42) in a well (14) in a mold (16) with an insulative air space (82) provided between the nozzle (12) and the mold (16), the insert (10) comprising a generally cylindrical hollow central portion (86) and a hollow rear seating portion (88) wherein the hollow central portion (86) has a cylindrical wall (92) with an inner surface (94) and an outer surface (96), the rear seating portion (88) forming a rearward facing inner shoulder (100) to receive the support flange (42) of the nozzle (12) to accurately support the nozzle (12) in the well (14) in the mold (16) with a portion of the nozzle (12) extending through the central opening (84) in the insert (10), a hollow forward sealing portion (90) being provided, which has a uniform cross section with an inner surface (108), an outer surface (110), and a V-shaped forward face (106) extending between the inner surface (108) and the outer surface (110), the sealing portion (90) bridging the insulative air space (82) between the nozzle (12) and the mold (16) with the inner surface (108) sealing against the nozzle (12) and the outer surface (110) sealing against the mold (16) to prevent melt escaping into the insulative air space (82), characterised in that the insert (10) integrally extends between the hollow rear seating portion (88) and the hollow forward sealing portion (90) the rear seating portion (88) being outwardly flanged from the central portion (86) to seat in the well (14) in the mold (16), the sealing portion extends forwardly from the central portion (86), and the inner surface (108) of the forward sealing portion (90) being a predetermined distance inward from the inner surface of the cylindrical wall (92), and the outer surface (110) of the forward sealing portion (90) being a predetermined distance outward from the outer surface of the cylindrical wall (92).
    2. An injection molding seating insert as claimed in claim 1 wherein the rear seating portion (88) extends rearwardly around the rearward facing inner shoulder (100) to form a cylindrical seat (104) in which the support flange (42) of the nozzle (12) is received.
    3. An injection molding seating insert as claimed in claim 2 wherein the flanged rear seating portion (88) forms a circular forward facing outer shoulder (98) to seat against a matching rearward facing shoulder (102) in the well (14) in the mold (16).
    4. An injection molding seating insert as claimed in claim 3 wherein at least one of the inner and outer surfaces (108,110) of the forward sealing portion (90) has an insulative groove (114) extending therearound.
    5. An injection molding seating insert as claimed in claim 3 formed of steel.
    EP93111931A 1992-07-27 1993-07-26 Injection molding nozzle insert Expired - Lifetime EP0583652B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    CA002074694A CA2074694C (en) 1992-07-27 1992-07-27 Injection molding nozzle insert
    CA2074694 1992-07-27

    Publications (2)

    Publication Number Publication Date
    EP0583652A1 EP0583652A1 (en) 1994-02-23
    EP0583652B1 true EP0583652B1 (en) 1998-04-22

    Family

    ID=4150205

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP93111931A Expired - Lifetime EP0583652B1 (en) 1992-07-27 1993-07-26 Injection molding nozzle insert

    Country Status (7)

    Country Link
    US (1) US5269676A (en)
    EP (1) EP0583652B1 (en)
    JP (1) JP3199911B2 (en)
    CN (1) CN1048213C (en)
    AT (1) ATE165269T1 (en)
    CA (1) CA2074694C (en)
    DE (2) DE4325064A1 (en)

    Families Citing this family (17)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US5885628A (en) * 1993-08-12 1999-03-23 Dynisco, Inc. Injection molding nozzle
    US5639490A (en) * 1995-06-07 1997-06-17 Tradesco Mold Limited Injector with locking nozzle
    CA2190569C (en) * 1996-11-18 2005-11-08 Jobst Ulrich Gellert Injection molding nozzle with edge gate inserts and sealing ring
    US6318990B1 (en) 1998-10-16 2001-11-20 Mold-Masters Limited Injection molding nozzle apparatus
    WO2000051803A1 (en) * 1999-02-26 2000-09-08 Mold-Masters Limited Multi-cavity injection molding apparatus splitting melt near nozzle front
    CA2264224A1 (en) * 1999-02-26 2000-08-26 Denis Babin Multi-cavity injection molding apparatus splitting melt near nozzle front
    CA2332061A1 (en) 2001-01-23 2002-07-23 Mold-Masters Limited Nozzle end for multiple tipped injection molding nozzle
    WO2003066310A1 (en) * 2002-02-04 2003-08-14 Mold-Masters Limited Thermal seal between manifold and nozzle
    CA2537831A1 (en) * 2003-09-09 2005-03-17 Mold-Masters Limited Hot runner nozzle and manifold seal
    US7234122B2 (en) * 2004-04-19 2007-06-19 Lsi Corporation Three-dimensional interconnect resistance extraction using variational method
    CA2505284A1 (en) * 2004-12-21 2006-06-21 Manuel Gomes Integrated multiple edge gate
    US7396226B2 (en) * 2006-03-10 2008-07-08 Mold-Masters (2007) Limited Nozzle sealing assembly
    US7614869B2 (en) 2007-05-08 2009-11-10 Mold-Masters (2007) Limited Manifold nozzle connection for an injection molding system
    US7845936B2 (en) * 2009-01-21 2010-12-07 Mold-Masters (2007) Limited Sealing arrangement for an edge gated nozzle in an injection molding system
    CN104169061B (en) * 2012-09-27 2016-07-06 奥林巴斯株式会社 Hot runner molding device and hot-runner nozzle
    US9272455B2 (en) 2014-04-30 2016-03-01 Mold-Masters (2007) Limited Hot runner system sealing arrangement
    CN104260716A (en) * 2014-07-19 2015-01-07 芜湖恒坤汽车部件有限公司 Oil nozzle for pump

    Family Cites Families (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US4053271A (en) * 1976-02-04 1977-10-11 Gellert Jobst U Valve-gated injection molding mechanism
    US4312630A (en) * 1980-03-18 1982-01-26 Nicola Travaglini Heaterless hot nozzle
    CA1238161A (en) * 1985-12-02 1988-06-21 Jobst U. Gellert Manufacturing method for selected gate configuration injection molding nozzles
    CA1252970A (en) * 1986-10-23 1989-04-25 Mold-Masters Limited Dual feed bushing for multi-cavity injection molding
    CA2010855C (en) * 1990-02-23 1999-07-27 Jobst Ulrich Gellert Injection molding system having spring biased nozzles
    CA2052595C (en) * 1991-10-01 2002-09-24 Jobst Ulrich Gellert Injection molding apparatus with angled tip probe

    Also Published As

    Publication number Publication date
    CN1048213C (en) 2000-01-12
    DE69318080D1 (en) 1998-05-28
    ATE165269T1 (en) 1998-05-15
    CA2074694A1 (en) 1994-01-28
    EP0583652A1 (en) 1994-02-23
    DE69318080T2 (en) 1998-08-13
    US5269676A (en) 1993-12-14
    JP3199911B2 (en) 2001-08-20
    CN1081956A (en) 1994-02-16
    CA2074694C (en) 2000-01-18
    JPH0691696A (en) 1994-04-05
    DE4325064A1 (en) 1994-02-03

    Similar Documents

    Publication Publication Date Title
    EP0583652B1 (en) Injection molding nozzle insert
    US5494433A (en) Injection molding hot tip side gate seal having a circumferential rim
    US5268184A (en) Injection molding nozzle with removable forward member
    CA2262176C (en) Injection molding cooled cavity insert
    EP0933186B1 (en) Injection molding cooled gate insert
    CA2099334C (en) Injection molding insert with melt inlet and pin aligned
    US5955121A (en) Injection molding apparatus with insert secured through the manifold to a nozzle
    US5591465A (en) Side gated injection molding apparatus with radially mounted gate inserts
    CA2127211C (en) Injection molding nozzle with removable collar portion
    US4818217A (en) Injection molding system with nozzles in tandem
    CA2030287C (en) Injection molding apparatus having separate heating element in the cavity forming insert
    US6318990B1 (en) Injection molding nozzle apparatus
    US5536165A (en) Injection molding apparatus with nozzle advanceable to mount side gate seals
    US4795338A (en) Mounting for injection molding nozzle
    US4854851A (en) Injection molding system with insertable insulating ring
    EP0633118B1 (en) Two-piece injection molding nozzle seal
    EP0743157B1 (en) Injection molding apparatus with nozzle advanceable to mount side gate seals
    EP0842751B1 (en) Injection molding nozzle with edge gate inserts and sealing ring
    EP0657269B1 (en) Injection molding apparatus with perpendicular hot tip gates
    EP0960713B1 (en) Injection molding apparatus having nozzles with elongated mounting flanges
    EP0743158B1 (en) Injection molding hot tip side gate seal with circumferential rim
    EP0609676A1 (en) Injection molding nozzle with thermocouple tube
    EP0346900B1 (en) Injection molding system with insertable insulating ring
    CA2082700A1 (en) Injection molding torpedo with diagonal melt bore
    CA2250598A1 (en) Apparatus for locating and sealing an injection molding nozzle

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): AT BE CH DE DK ES FR GB IE IT LI LU NL PT SE

    17P Request for examination filed

    Effective date: 19940822

    17Q First examination report despatched

    Effective date: 19950816

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): AT BE CH DE DK ES FR GB IE IT LI LU NL PT SE

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: NL

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 19980422

    Ref country code: LI

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 19980422

    Ref country code: ES

    Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

    Effective date: 19980422

    Ref country code: CH

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 19980422

    Ref country code: BE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 19980422

    Ref country code: AT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 19980422

    REF Corresponds to:

    Ref document number: 165269

    Country of ref document: AT

    Date of ref document: 19980515

    Kind code of ref document: T

    REG Reference to a national code

    Ref country code: CH

    Ref legal event code: EP

    REF Corresponds to:

    Ref document number: 69318080

    Country of ref document: DE

    Date of ref document: 19980528

    ITF It: translation for a ep patent filed

    Owner name: MARCHI & PARTNERS S.R.L.

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: SE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 19980722

    Ref country code: PT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 19980722

    Ref country code: DK

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 19980722

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: LU

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 19980726

    Ref country code: IE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 19980726

    REG Reference to a national code

    Ref country code: IE

    Ref legal event code: FG4D

    Free format text: 79904

    ET Fr: translation filed
    NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
    REG Reference to a national code

    Ref country code: CH

    Ref legal event code: PL

    PLBE No opposition filed within time limit

    Free format text: ORIGINAL CODE: 0009261

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

    26N No opposition filed
    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: IF02

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: 732E

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: IT

    Payment date: 20080717

    Year of fee payment: 16

    Ref country code: FR

    Payment date: 20080730

    Year of fee payment: 16

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: TP

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: GB

    Payment date: 20080630

    Year of fee payment: 16

    GBPC Gb: european patent ceased through non-payment of renewal fee

    Effective date: 20090726

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: ST

    Effective date: 20100331

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: FR

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20090731

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: GB

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20090726

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: IT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20090726

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: DE

    Payment date: 20120625

    Year of fee payment: 20

    REG Reference to a national code

    Ref country code: DE

    Ref legal event code: R071

    Ref document number: 69318080

    Country of ref document: DE

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: DE

    Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

    Effective date: 20130727